Added MFA device to IAM Identity Center user, still says 0 devices, can't re-add

My personal lab AWS account, single IAM Identity Center user. I registered an MFA device for it in IAM Identity Center > User > 'user' > MFA devices > Register MFA device. I now have it my authenticator app. However, in that portal, it still shows 0 MFA devices. I waited 10+ minutes, logged off/on, still nothing. I tried registering for another device, but it says "You cannot register any more devices of this type. Please select a different MFA device."

Apparently I'm unable to connect my Terraform to my AWS via VScode using IAM Identity Center without MFA enabled.